Complete the sentence so the result is an identity. Let x be any real number. = 

A. cos x
B. sec x
C. csc x
D. cot x

Answer: A

Mathematics

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Find the equation of the indicated least-squares curve. Sketch the curve and plot the data points on the same graph.The following data were found for the distance y that an object rolled down an inclined plane in time x. Find the least-squares curve 

A. y = 6.53x2 + 6.81

B. y = 13.06x2 + 3.41

C. y = 9.7x2 + 15.1

D. y = 6.53x2 - 6.81

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Mathematics

Find the function represented by the power series. 

A. - 
B.
C.
D. - 

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Mathematics

Write the expression as a single logarithm with coefficient 1. Assume all variables represent positive real numbers with  and  .(loga x - loga  y) + 5 loga  z

A. loga 
B. loga  (x + z5 - y)
C. loga 
D. loga  

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Mathematics

Solve using a proportion. Round your answer to the nearest hundredth when necessary.On an architect's blueprint, 1 inch corresponds to 12 feet. If an exterior wall is  long, find how long the blueprint measurement should be. Write answer as a mixed number if necessary.

A. 5 inches
B. 64 inches
C. 48 inches
D. 1  inches

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Mathematics